Robin Roberts' MDS Update: 'My Body Is So Weak'

"The start of last week went well but the daily chemo/treatment caught up to me by the weekend," she wrote in a post for "Good Morning America." "My body is so weak but not my mind. YOU give me the courage to keep going."

Tuesday will be her last day of chemotherapy before she receives her bone marrow transplant on Thursday, she revealed. Roberts has been in the hospital since last Monday preparing for the procedure.